Razor blade sharpener



Fel). 1.1, 1947. F, R, CHESTER 2,415,463

l RAZOR BLADE SHARPENER Filed Oct. 9, 1944 fea! flan/vz E. C'Hfs/fe,

INVENTOR,

A Tram/fr Patented Feb. 1l.,k 1947 UNITED STATES PATENT OFFICE RAZOR BLADE SHARPENER g Frank R. Chester, Manhattan Beach, Calif. Application october 9, 1944, serial Nt. 557,877

Claims. 1

My present invention relates to a razor blade Sharpener,

One of the principal objects of' this invention is to provide a simple and portable device whereby safety razor blades may be sharpened by hollow-grinding the cutting edges thereof.

An important object also of this invention is to provide such a safety' razor blade Sharpener which is economical to make, easy to operate, one requiring no adjustments, and one which will not readily deteriorateV r get out of order.

Another important object of this invention is to provide a Sharpener of this class into which the safety razor blade maybe easily and correctly placed, and readily and securely held while sharpening the same.

A- further important object is to provide novel and simple means of operating cylindrical sharpening cr honing elements in a Sharpener of this class.

A novel and important feature of this invention is the provision of screw-like interlocking cylindrical sharpening elements or rollers, which are rotatable in the same direction and between which the edge of a safety razor blade may be loosely positioned and easily retained, and against the cutting edge of which a substantially continuous sharpening surface or means is applied.

A further novel important feature of this invention is the provision of sharpening means which is periodically reversed transversely and longitudinally of the cutting edge.

'With these and other objects in view, as will appear hereinafter, I have devised a Sharpener particularly adapted for safety razor blades, and one having certain novel features of construction, combination, and arrangement of parts and portions, as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawing, and to the characters of reference thereon, which form a part of this application, in which:

Fig. 1 is an end view of my Sharpener in va preferred form;

Fig. 2 is a sectional view thereof, taken through 2 2 of Fig. l;

Fig. 3 is an enlarged sectional view thereof, taken through 3-3 of Fig. 4;

Fig. 4 is a transverse sectional view thereof, taken through ll-lI of Fig. 3; and,

Fig. 5 is an enlarged fragmentary View showing in greater detail the hinged blade retainer, shown in Fig. 2.

Vlo

My razor blade Sharpener, as shown in the drawing, is carried in an enclosure or'caise I which is adapted to be drawn along and adapted to be operated by a cord 2, u i

',IIhe case is relatively long and is of substantially Y triangular 'cross-section vwith. rounded corners; That is, thel case is of substantially prismaticshape. s The opening or slit, designated I"-, for inserting the razor blade to'be sharpened, designated B", islocated at the top and at one of theyapex portions. i l i i y y The operating cord 2 is positioned at one rend of the casel and Vexte'r'ids from the opposite sides and near the bottom thereof. y s l Within the case are provided two razor blade sharpening elements or rolls II and I2. IThese are arranged on parallel axes and are located near theybottom and at the opposite [sides ofthe vertical plane passing through the slit Ia. That is, they are located Within the two lower apex portions I b and' Ic ofthe case.v

The sharpening elements or rolls II and I 2 may be made of a suitableabrasive material, and they are supported .onv arbors Ila and |251, which are mounted in the end walls Id and Ie of the' case;` These rolls are preferably made identical inform, and they are screw-like, being spirally uted. The spiral flange or ridge portions IIb and I2b of the respective rolls II and I2 extend into the spiral flutes I2e and IIc of the adjacently positioned rolls. The outer faces of the ridges IID and I2b are flat, and these portions engage and hollow-grind the edge portions of the blade, as shown best in Fig. 4.

At the coincident ends of the rolls Il and I2, and coaxial therewith are provided gears I3 and I4, respectively, the outside diameter of these gears being less than the diameters of the sharpening rolls. Each of these gears mesh with and are driven by a larger gear I5 revolubly mounted on a stud I6 secured to the end Wall Id of the case.

Forming a part of and coaxial with the gear I5 is a drive sheave I1. This sheave is driven by the cord 2 as the sharpening device is moved along the cord. On the arbors IIa and I2a, and

beyond the outer sides of the gears I3 and I4, are

idler sheaves I8 and I9 which guide the cord 2 around the drive sheave Il, and they also guide the end portions of the cord from the case. Thus movement of the device along the cord 2 causes the latter to be guided around and to rotate the sheave I'I.

serted, between the adjacent portions of the sharpening rolls Il and I2, through the slit la of the case. The blade is yieldably held in such sharpening relation with the rolls H and I2 by means of a blade retainer 20 which is pivoted at one end to the case beyond one end of the slit la. It is adapted to be resiliently held in a position over the slit by means of a spring 2 l.

By reason of the rotation of the sharpening rolls in the same direction, one of the rolls tends to draw theedg'eofgthe-blade' between the rolls, but the other roll tends to force the blade outwardly. Thus a slight pressure on the outer edge K cord extending from the opposite sides of the enof the blade tends to hold the blade in sharpening position between the rolls. L f. Y Though I have shown and described a particular construction, combination, and arrangement of parts and portions, I do not wish to'be -limited ,Y Y to the same, but desire to include in the scope of my invention the construction, combination, and

arrangement substantially as set forth in the appended claims, A A

1, In a Sharpener, a pair of like spirally-uted sharpening rolls arrangedonwparallel axes with the ridge portions between the utes of one element extending into the `flutes of the other, and means for rotating the elements inthe samedi- `rection. 2L Ina Sharpener, a pair of like spirallyfuted 'sharpening rolls arrangd'on parallel axes with 'the ridge portions between the flutes of one ele-'l `ment extending into the llutes of the other, means 'for rotating the-elements in the same direction, and means for operating. thelatter means alternately in opposite directions. f v

3; In a Sharpener, a pair ofcyl'indrical sharpening elements arranged'on'parallel axes, a gear ,fixed at the coincident ends oi and coaxially with .each sharpening element, a third Ygear meshing with both of the rst gears'for rotating both ele- Jments in the same direction, a sheave xed coaxially to the third gear, idleisheaves. rotatably 'carried by and coaxially `with said sharpening elementsfand a 4cord extendinglover the idler sheaves and around the sheave on the third gear.

drical sharpening elements arranged on parallel ,e 4. In a Sharpener, an enclosure, a pair of cylinclosure. Y 5. In a Sharpener, an enclosure, a pair of adjacently positioned cylindrical sharpening elements arranged on parallel axes within the enclosure, means for holding a blade within the REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,459,676 Kirsten June 19, 1923 2,228,335 Burns Jan. 14, 1941 191,859 Jahne'et al June 12, 1877 1,438,098 Delzell Dec. 5, 1922 1,519,170 Shrayer Dec. 16, 1924 FOREIGN PATENTS Number Country Date 475,216 British Nov. 16, 1937 272,176 British Sept. 1, 1927 

